1	package antlr;
2	
3	/**
4	 * <b>SOFTWARE RIGHTS</b>
5	 * <p>
6	 * ANTLR 2.5.0 MageLang Institute, 1998
7	 * <p>
8	 * We reserve no legal rights to the ANTLR--it is fully in the
9	 * public domain. An individual or company may do whatever
10	 * they wish with source code distributed with ANTLR or the
11	 * code generated by ANTLR, including the incorporation of
12	 * ANTLR, or its output, into commerical software.
13	 * <p>
14	 * We encourage users to develop software with ANTLR. However,
15	 * we do ask that credit is given to us for developing
16	 * ANTLR. By "credit", we mean that if you use ANTLR or
17	 * incorporate any source code into one of your programs
18	 * (commercial product, research project, or otherwise) that
19	 * you acknowledge this fact somewhere in the documentation,
20	 * research report, etc... If you like ANTLR and have
21	 * developed a nice tool with the output, please mention that
22	 * you developed it using ANTLR. In addition, we ask that the
23	 * headers remain intact in our source code. As long as these
24	 * guidelines are kept, we expect to continue enhancing this
25	 * system and expect to make other tools available as they are
26	 * completed.
27	 * <p>
28	 * The ANTLR gang:
29	 * @version ANTLR 2.5.0 MageLang Institute, 1998
30	 * @author Terence Parr, <a href=http://www.MageLang.com>MageLang Institute</a>
31	 * @author <br>John Lilley, <a href=http://www.Empathy.com>Empathy Software</a>
32	 */
33	class CharRangeElement extends AlternativeElement {
34		String label;
35		protected char begin=0;
36		protected char end  =0;
37		protected String beginText;
38		protected String endText;
39	
40	
41		public CharRangeElement(LexerGrammar g, Token t1, Token t2, int autoGenType) {
42			super(g);
43			begin = (char)ANTLRLexer.tokenTypeForCharLiteral(t1.getText());
44			beginText = t1.getText();
45			end   = (char)ANTLRLexer.tokenTypeForCharLiteral(t2.getText());
46			endText = t2.getText();
47			line = t1.getLine();
48			// track which characters are referenced in the grammar
49			for (int i=begin; i<=end; i++) {
50				g.charVocabulary.add(i);
51			}
52			this.autoGenType = autoGenType;
53		}
54		public void generate() {
55			grammar.generator.gen(this);
56		}
57		public String getLabel() {
58			return label;
59		}
60		public Lookahead look(int k) {
61			return grammar.theLLkAnalyzer.look(k, this);
62		}
63		public void setLabel(String label_) { 
64			label = label_; 
65		}
66		public String toString() {
67			if ( label!=null ) return " "+label+":"+beginText+".."+endText;
68			else return " "+beginText+".."+endText;
69		}
70	}
71